Method for removing SOx from gas with compound alcohol-amine solution
US9999852B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 13, 2014 |
| Grant date | Jun 19, 2018 |
| Priority date | — |
| Expiry date | Feb 21, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for removing SOx from a gas by using a compound alcohol-amine solution is provided. The compound alcohol-amine solution is made by mixing ethylene glycol and/or polyethylene glycol with hydroxyl and/or carboxyl organic compound having basic group containing nitrogen. The compound alcohol-amine solution is contacted with the gas containing SOx to absorb the SOx in the gas, wherein x=2 and/or 3. The compound alcohol-amine solution with absorbed SOx is regenerated by one or more of heating method, vacuum method, gas stripping method, ultrasonic method, microwave method, and radiation method to release by-products of sulfur dioxide and sulfur trioxide, and the regenerated compound alcohol-amine solution is recycled for use. This method can be used for removing SOx from flue gas, burning gas, coke-oven gas, synthesis waste gas from dyestuff plants, sewage gas from chemical fiber plants, and other industrial raw material gases or waste gases containing SOx.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.